/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem02_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:16:16,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:16:16,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:16:16,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:16:16,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:16:16,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:16:16,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:16:16,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:16:16,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:16:16,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:16:16,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:16:16,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:16:16,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:16:16,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:16:16,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:16:16,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:16:16,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:16:16,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:16:16,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:16:16,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:16:16,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:16:16,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:16:16,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:16:16,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:16:16,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:16:16,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:16:16,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:16:16,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:16:16,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:16:16,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:16:16,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:16:16,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:16:16,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:16:16,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:16:16,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:16:16,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:16:16,516 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:16:16,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:16:16,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:16:16,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:16:16,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:16:16,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 21:16:16,544 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:16:16,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:16:16,544 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:16:16,544 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:16:16,545 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:16:16,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:16:16,545 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:16:16,545 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:16:16,545 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:16:16,545 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:16:16,546 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:16:16,546 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:16:16,546 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:16:16,546 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:16:16,546 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:16:16,546 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:16:16,546 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:16:16,546 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:16:16,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:16:16,547 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:16:16,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:16:16,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:16:16,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:16:16,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:16:16,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:16:16,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:16:16,548 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:16:16,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:16:16,548 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:16:16,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:16:16,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:16:16,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:16:16,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:16:16,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:16:16,549 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:16:16,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:16:16,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:16:16,549 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:16:16,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:16:16,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:16:16,550 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:16:16,550 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:16:16,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:16:16,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:16:16,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:16:16,801 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:16:16,802 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:16:16,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label48.c [2023-03-31 21:16:18,013 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:16:18,290 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:16:18,291 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label48.c [2023-03-31 21:16:18,309 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/784b3bb8d/2e93b1bfaa4e428fbbb978166aee80bf/FLAG620ce19e7 [2023-03-31 21:16:18,327 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/784b3bb8d/2e93b1bfaa4e428fbbb978166aee80bf [2023-03-31 21:16:18,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:16:18,330 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:16:18,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:16:18,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:16:18,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:16:18,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:16:18" (1/1) ... [2023-03-31 21:16:18,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@269b8796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:18, skipping insertion in model container [2023-03-31 21:16:18,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:16:18" (1/1) ... [2023-03-31 21:16:18,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:16:18,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:16:18,651 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label48.c[20995,21008] [2023-03-31 21:16:18,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:16:18,678 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:16:18,818 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label48.c[20995,21008] [2023-03-31 21:16:18,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:16:18,845 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:16:18,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:18 WrapperNode [2023-03-31 21:16:18,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:16:18,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:16:18,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:16:18,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:16:18,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:18" (1/1) ... [2023-03-31 21:16:18,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:18" (1/1) ... [2023-03-31 21:16:18,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:18" (1/1) ... [2023-03-31 21:16:18,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:18" (1/1) ... [2023-03-31 21:16:18,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:18" (1/1) ... [2023-03-31 21:16:18,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:18" (1/1) ... [2023-03-31 21:16:18,927 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:18" (1/1) ... [2023-03-31 21:16:18,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:18" (1/1) ... [2023-03-31 21:16:18,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:16:18,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:16:18,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:16:18,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:16:18,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:18" (1/1) ... [2023-03-31 21:16:18,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:16:18,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:16:18,974 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 21:16:18,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 21:16:19,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:16:19,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:16:19,014 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:16:19,015 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:16:19,015 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:16:19,016 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:16:19,016 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:16:19,016 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:16:19,016 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:16:19,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:16:19,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:16:19,016 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:16:19,016 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:16:19,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:16:19,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:16:19,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:16:19,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:16:19,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:16:19,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:16:19,105 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:16:19,108 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:16:20,002 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:16:20,276 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:16:20,277 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:16:20,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:16:20 BoogieIcfgContainer [2023-03-31 21:16:20,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:16:20,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:16:20,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:16:20,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:16:20,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:16:18" (1/3) ... [2023-03-31 21:16:20,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d96e8a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:16:20, skipping insertion in model container [2023-03-31 21:16:20,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:18" (2/3) ... [2023-03-31 21:16:20,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d96e8a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:16:20, skipping insertion in model container [2023-03-31 21:16:20,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:16:20" (3/3) ... [2023-03-31 21:16:20,289 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label48.c [2023-03-31 21:16:20,305 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:16:20,305 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:16:20,347 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:16:20,353 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3455192e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:16:20,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:16:20,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:16:20,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-03-31 21:16:20,368 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:20,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:16:20,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:20,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:20,374 INFO L85 PathProgramCache]: Analyzing trace with hash -818160297, now seen corresponding path program 1 times [2023-03-31 21:16:20,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:20,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078548425] [2023-03-31 21:16:20,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:20,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:21,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:21,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078548425] [2023-03-31 21:16:21,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078548425] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:21,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:16:21,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:16:21,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585811271] [2023-03-31 21:16:21,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:21,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:16:21,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:21,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:16:21,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:16:21,156 INFO L87 Difference]: Start difference. First operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 21:16:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:21,562 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-03-31 21:16:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:16:21,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-03-31 21:16:21,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:21,578 INFO L225 Difference]: With dead ends: 273 [2023-03-31 21:16:21,579 INFO L226 Difference]: Without dead ends: 175 [2023-03-31 21:16:21,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:16:21,584 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 21 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:21,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 48 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:16:21,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-03-31 21:16:21,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-03-31 21:16:21,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.784431137724551) internal successors, (298), 167 states have internal predecessors, (298), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 21:16:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 307 transitions. [2023-03-31 21:16:21,627 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 307 transitions. Word has length 86 [2023-03-31 21:16:21,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:21,627 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 307 transitions. [2023-03-31 21:16:21,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 21:16:21,628 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 307 transitions. [2023-03-31 21:16:21,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-03-31 21:16:21,632 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:21,632 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:16:21,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:16:21,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:21,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:21,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1524530731, now seen corresponding path program 1 times [2023-03-31 21:16:21,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:21,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650760349] [2023-03-31 21:16:21,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:21,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:21,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:21,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650760349] [2023-03-31 21:16:21,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650760349] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:21,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:16:21,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:16:21,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546148826] [2023-03-31 21:16:21,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:21,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:16:21,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:21,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:16:21,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:16:21,841 INFO L87 Difference]: Start difference. First operand 175 states and 307 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:16:22,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:22,293 INFO L93 Difference]: Finished difference Result 533 states and 961 transitions. [2023-03-31 21:16:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:16:22,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 98 [2023-03-31 21:16:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:22,298 INFO L225 Difference]: With dead ends: 533 [2023-03-31 21:16:22,298 INFO L226 Difference]: Without dead ends: 363 [2023-03-31 21:16:22,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:16:22,301 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 288 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:22,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 44 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:16:22,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-03-31 21:16:22,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 351. [2023-03-31 21:16:22,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 335 states have (on average 1.7373134328358208) internal successors, (582), 339 states have internal predecessors, (582), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-03-31 21:16:22,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 610 transitions. [2023-03-31 21:16:22,330 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 610 transitions. Word has length 98 [2023-03-31 21:16:22,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:22,330 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 610 transitions. [2023-03-31 21:16:22,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:16:22,331 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 610 transitions. [2023-03-31 21:16:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-03-31 21:16:22,334 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:22,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:16:22,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:16:22,335 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:22,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:22,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1209131803, now seen corresponding path program 1 times [2023-03-31 21:16:22,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:22,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871615639] [2023-03-31 21:16:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:22,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:22,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:22,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871615639] [2023-03-31 21:16:22,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871615639] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:22,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:16:22,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:16:22,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543499293] [2023-03-31 21:16:22,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:22,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:16:22,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:22,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:16:22,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:16:22,564 INFO L87 Difference]: Start difference. First operand 351 states and 610 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:16:22,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:22,861 INFO L93 Difference]: Finished difference Result 1039 states and 1862 transitions. [2023-03-31 21:16:22,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:16:22,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 99 [2023-03-31 21:16:22,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:22,866 INFO L225 Difference]: With dead ends: 1039 [2023-03-31 21:16:22,866 INFO L226 Difference]: Without dead ends: 693 [2023-03-31 21:16:22,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:16:22,869 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 9 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:22,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 190 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:16:22,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-03-31 21:16:22,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2023-03-31 21:16:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 666 states have (on average 1.6036036036036037) internal successors, (1068), 673 states have internal predecessors, (1068), 10 states have call successors, (10), 10 states have call predecessors, (10), 16 states have return successors, (73), 9 states have call predecessors, (73), 9 states have call successors, (73) [2023-03-31 21:16:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1151 transitions. [2023-03-31 21:16:22,900 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1151 transitions. Word has length 99 [2023-03-31 21:16:22,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:22,901 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 1151 transitions. [2023-03-31 21:16:22,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:16:22,901 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1151 transitions. [2023-03-31 21:16:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-03-31 21:16:22,907 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:22,907 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:16:22,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:16:22,908 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:22,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:22,908 INFO L85 PathProgramCache]: Analyzing trace with hash -520302033, now seen corresponding path program 1 times [2023-03-31 21:16:22,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:22,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852746591] [2023-03-31 21:16:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:22,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:23,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:23,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852746591] [2023-03-31 21:16:23,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852746591] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:23,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:16:23,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:16:23,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574562169] [2023-03-31 21:16:23,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:23,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:16:23,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:23,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:16:23,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:16:23,087 INFO L87 Difference]: Start difference. First operand 693 states and 1151 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:16:23,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:23,565 INFO L93 Difference]: Finished difference Result 1953 states and 3505 transitions. [2023-03-31 21:16:23,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:16:23,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 100 [2023-03-31 21:16:23,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:23,575 INFO L225 Difference]: With dead ends: 1953 [2023-03-31 21:16:23,575 INFO L226 Difference]: Without dead ends: 1265 [2023-03-31 21:16:23,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:16:23,578 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 356 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:23,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 42 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:16:23,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2023-03-31 21:16:23,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1231. [2023-03-31 21:16:23,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1175 states have (on average 1.48) internal successors, (1739), 1199 states have internal predecessors, (1739), 16 states have call successors, (16), 16 states have call predecessors, (16), 39 states have return successors, (224), 15 states have call predecessors, (224), 15 states have call successors, (224) [2023-03-31 21:16:23,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1979 transitions. [2023-03-31 21:16:23,643 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1979 transitions. Word has length 100 [2023-03-31 21:16:23,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:23,643 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 1979 transitions. [2023-03-31 21:16:23,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:16:23,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1979 transitions. [2023-03-31 21:16:23,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-03-31 21:16:23,648 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:23,648 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:16:23,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:16:23,648 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:23,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:23,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1162065459, now seen corresponding path program 1 times [2023-03-31 21:16:23,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:23,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352648777] [2023-03-31 21:16:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:23,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:24,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:24,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352648777] [2023-03-31 21:16:24,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352648777] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:24,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:16:24,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:16:24,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688662820] [2023-03-31 21:16:24,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:24,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:16:24,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:24,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:16:24,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:16:24,162 INFO L87 Difference]: Start difference. First operand 1231 states and 1979 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:16:24,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:24,657 INFO L93 Difference]: Finished difference Result 2581 states and 4193 transitions. [2023-03-31 21:16:24,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:16:24,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 102 [2023-03-31 21:16:24,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:24,666 INFO L225 Difference]: With dead ends: 2581 [2023-03-31 21:16:24,666 INFO L226 Difference]: Without dead ends: 1355 [2023-03-31 21:16:24,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:16:24,673 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 252 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:24,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 46 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:16:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2023-03-31 21:16:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1347. [2023-03-31 21:16:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1273 states have (on average 1.3998428908091123) internal successors, (1782), 1313 states have internal predecessors, (1782), 17 states have call successors, (17), 17 states have call predecessors, (17), 56 states have return successors, (278), 16 states have call predecessors, (278), 16 states have call successors, (278) [2023-03-31 21:16:24,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 2077 transitions. [2023-03-31 21:16:24,732 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 2077 transitions. Word has length 102 [2023-03-31 21:16:24,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:24,733 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 2077 transitions. [2023-03-31 21:16:24,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:16:24,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 2077 transitions. [2023-03-31 21:16:24,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-03-31 21:16:24,737 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:24,737 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:16:24,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 21:16:24,737 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:24,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:24,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1281648871, now seen corresponding path program 1 times [2023-03-31 21:16:24,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:24,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124962229] [2023-03-31 21:16:24,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:24,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:16:25,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:25,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124962229] [2023-03-31 21:16:25,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124962229] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:16:25,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551539981] [2023-03-31 21:16:25,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:25,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:16:25,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:16:25,129 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:16:25,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:16:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:25,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-31 21:16:25,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:16:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 21:16:25,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:16:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 21:16:25,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551539981] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 21:16:25,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 21:16:25,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2023-03-31 21:16:25,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052371458] [2023-03-31 21:16:25,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:25,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 21:16:25,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:25,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 21:16:25,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-03-31 21:16:25,699 INFO L87 Difference]: Start difference. First operand 1347 states and 2077 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:16:26,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:26,099 INFO L93 Difference]: Finished difference Result 3333 states and 5314 transitions. [2023-03-31 21:16:26,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 21:16:26,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 107 [2023-03-31 21:16:26,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:26,113 INFO L225 Difference]: With dead ends: 3333 [2023-03-31 21:16:26,114 INFO L226 Difference]: Without dead ends: 1991 [2023-03-31 21:16:26,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 210 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-03-31 21:16:26,123 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 166 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:26,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 27 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:16:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2023-03-31 21:16:26,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1985. [2023-03-31 21:16:26,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1872 states have (on average 1.3814102564102564) internal successors, (2586), 1937 states have internal predecessors, (2586), 24 states have call successors, (24), 24 states have call predecessors, (24), 88 states have return successors, (453), 23 states have call predecessors, (453), 23 states have call successors, (453) [2023-03-31 21:16:26,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 3063 transitions. [2023-03-31 21:16:26,198 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 3063 transitions. Word has length 107 [2023-03-31 21:16:26,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:26,200 INFO L495 AbstractCegarLoop]: Abstraction has 1985 states and 3063 transitions. [2023-03-31 21:16:26,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:16:26,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 3063 transitions. [2023-03-31 21:16:26,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-03-31 21:16:26,205 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:26,205 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:16:26,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 21:16:26,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-31 21:16:26,412 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:26,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:26,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1135318830, now seen corresponding path program 1 times [2023-03-31 21:16:26,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:26,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584324308] [2023-03-31 21:16:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:26,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:26,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:26,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584324308] [2023-03-31 21:16:26,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584324308] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:26,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:16:26,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:16:26,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951901264] [2023-03-31 21:16:26,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:26,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:16:26,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:26,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:16:26,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:16:26,601 INFO L87 Difference]: Start difference. First operand 1985 states and 3063 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:16:27,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:27,088 INFO L93 Difference]: Finished difference Result 4439 states and 6966 transitions. [2023-03-31 21:16:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:16:27,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 114 [2023-03-31 21:16:27,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:27,100 INFO L225 Difference]: With dead ends: 4439 [2023-03-31 21:16:27,101 INFO L226 Difference]: Without dead ends: 2459 [2023-03-31 21:16:27,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:16:27,106 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 256 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:27,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 44 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:16:27,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2023-03-31 21:16:27,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2443. [2023-03-31 21:16:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2443 states, 2301 states have (on average 1.3111690569317689) internal successors, (3017), 2385 states have internal predecessors, (3017), 29 states have call successors, (29), 29 states have call predecessors, (29), 112 states have return successors, (564), 28 states have call predecessors, (564), 28 states have call successors, (564) [2023-03-31 21:16:27,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 3610 transitions. [2023-03-31 21:16:27,183 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 3610 transitions. Word has length 114 [2023-03-31 21:16:27,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:27,184 INFO L495 AbstractCegarLoop]: Abstraction has 2443 states and 3610 transitions. [2023-03-31 21:16:27,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:16:27,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 3610 transitions. [2023-03-31 21:16:27,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-03-31 21:16:27,191 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:27,191 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:16:27,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 21:16:27,191 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:27,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:27,194 INFO L85 PathProgramCache]: Analyzing trace with hash 671148933, now seen corresponding path program 1 times [2023-03-31 21:16:27,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:27,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360092320] [2023-03-31 21:16:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:27,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 123 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:27,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:27,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360092320] [2023-03-31 21:16:27,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360092320] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:16:27,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908529224] [2023-03-31 21:16:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:27,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:16:27,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:16:27,691 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:16:27,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:16:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:27,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:16:27,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:16:28,000 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 21:16:28,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:16:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 21:16:28,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908529224] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:16:28,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [653945044] [2023-03-31 21:16:28,286 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-03-31 21:16:28,286 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:16:28,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:16:28,294 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:16:28,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:16:28,526 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 65 for LOIs [2023-03-31 21:16:29,287 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 75 for LOIs